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Alkaline gel electrophoresis of E. coli BW372 treated with SnCl2 (25 μg/mL), UVA (90 kJ/m2) and pre-illuminated with UVA, followed by SnCl2 incubation. Lanes: (1) control; (2) SnCl2; (3) UVA; (4) UVA + SnCl2; (5) SnCl2 30 minutes; (6) UVA 30 minutes; (7) UVA + SnCl2 30 minutes; (8) SnCl2 60 minutes; (9) UVA 60 minutes; (10) UVA + SnCl2 60 minutes; (11) SnCl2 90 minutes; (12) UVA 90 minutes; (13) UVA + SnCl2 90 minutes.
